Vocabulary
Structure of the Earth
Continental Drift Theory
Plate Tectonics
Miscellaneous
100
The thinnest layer of the Earth
What is the crust
100
There are ______________ main layers of the Earth.
What is four
100
Created the Continental Drift Theory
Who is Alfred Wegener
100
Earthquakes and Volcanoes are usually located in relation to these
What is a plate boundary
100
The Himalayan mountains are the result of a ___________________________ boundary.
What is convergent boundary
200
A number of rigid, but moving, pieces of Earth's surface
What is tectonic plates.
200

This is where convection currents take place

What is the mantle.

200

Evidence of matching mountains from two separate continents _____________________ and _____________________

What is Africa and South America

200
The mid-ocean ridge is an example of a ____________________ boundary and ___________________ occurs here where new ocean floor is formed.
What is divergent boundary; sea-floor spreading
200

This type of plate boundary does not create or destroy crust 

What is transform 

300
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory
300
Plates float on top of the _______________________.
What is the asthenosphere
300
Evidence of tropical plants were found on this continent
What is Antarctica
300

Name 2 of the major plates

What is any of the following North American plate, South American plate, Eurasian Plate, Indoaustralia plate, African plate, Antarctica plate

300
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes
400

The idea that the youngest (newest) rocks of the ocean floor are located at diverging boundaries and over time moves older rock outward

What is seafloor spreading

400
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere
400
Pangaea existed this many millions of years ago
What is around 250 million years ago
400

This is the mechanism (what causes) the plates to move

What is convection cycles in the mantle

400
The San Andreas Fault in California is an example of a ____________________ boundary.
What is a transform boundary
500
Crust is destroyed at this type of boundary 

What is convergent 

500

The Earth's crust is denser under the _____________________ and less dense under the _____________________.

What is denser under the ocean and less dense under the continents

500
Continental Drift Theory was not accepted because it did not explain this
What is how the continents moved
500

The two types of convergent boundaries

What is subduction (where volcanoes often occur) and collision (where mountains are usually formed)

500

New crust is formed at this type of boundary.

What is divergent 

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